HP-UX Reference (11i v1 00/12) - 5 Miscellaneous Topics, 7 Device (Special) Files, 9 General Information, Index (vol 9)

__________________________________________________________________________________________________________________________________________________________________________________________________
__________________________________________________________________________________________________________________________________________________________________________________________________
STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man7/!!!intro.7
________________________________________________________________
___ ___
v
vxfsio(7) vxfsio(7)
VX_FSO_NOLOG
Indicates that intent logging of structural changes to the file system is disabled. (See the
nolog mount option of mount_vxfs(1M)).
VX_FSO_OSYNC_CLOSESYNC
Indicates that any non-logged changes to the inode or data will be flushed to disk when a
file accessed with O_SYNC is closed. (See the convosync=closesync mount option
of mount_vxfs(1M)).
VX_FSO_OSYNC_DELAY
Indicates that any O_SYNC writes will be delayed rather than to take effect immediately.
No special action is taken when a file is closed.
VX_FSO_OSYNC_DIRECT
Indicates that any O_SYNC I/O will be handled as if the VX_DIRECT cache advisory had
been set on the file instead. Also, any non-logged changes to the inode or data will be
flushed to disk when a file accessed with O_SYNC is closed. (See the
convosync=direct mount option of mount_vxfs(1M)).
VX_FSO_OSYNC_DSYNC
Indicates that any O_SYNC writes will be handled as if the
VX_DSYNC cache advisory
had been set on the file instead. Also, any non-logged changes to the inode or data will be
flushed to disk when a file accessed with
O_SYNC is closed. (See the
convosync=dsync mount option of mount_vxfs(1M)).
VX_FSO_OSYNC_UNBUFFERED
Indicates that any O_SYNC I/O will be handled as if the VX_UNBUFFERED
cache
advisory had been set on the file. Also, any non-logged changes to the inode or data will be
flushed to disk when a file accessed with
O_SYNC is closed. (See the
convosync=unbuffered
mount option of mount_vxfs(1M)).
VX_FSO_SNAPPED
Indicates that a snapshot backup of this file system is being maintained.
VX_FSO_SNAPSHOT
Indicates that this file system is a snapshot backup of another file system.
VX_FSO_TMPLOG
Indicates that the intent log is almost always delayed. (See the tmplog mount option of
mount_vxfs(1M)).
VX_FSO_VJFS
Indicates that the HP OnLineJFS product is not installed.
The VX_GETFSOPT ioctl returns a zero if the file system options are successfully obtained. If the
operation fails, the return value is -1 and the external variable errno is a general DIAGNOSTIC.
VX_FREEZE
Sync then freeze the file system. Once frozen, all further operations against the file system block
until a VX_THAW operation is received. The argument arg is a timeout value expressed in seconds.
If a VX_THAW operation is not received within the specified timeout interval, the file system will per-
form a VX_THAW operation automatically.
Only privileged users can run this command on the root directory of the file system.
The VX_FREEZE ioctl returns a zero if the file system is successfully frozen. If the operation fails,
the return value is -1 and the external variable errno is a general DIAGNOSTIC.
VX_THAW
Unblock a file system that has been frozen by a VX_FREEZE operation. The argument arg should
be NULL. The process that is to issue a VX_THAW operation must have the root directory of the file
system open, and must ensure that it does not access the file system after the file system has been
frozen, to ensure that the process itself does not block.
Only privileged users can run this command on the root directory of the file system.
The VX_THAW ioctl returns a zero if the file system is successfully unfrozen. If the operation fails,
the return value is -1 and the external variable errno is a general DIAGNOSTIC or one of the diag-
nostics listed in the DIAGNOSTICS section.
Section 7−−192 − 4 − HP-UX Release 11i: December 2000
___
___